Thread: Is rear diff lock necessary?

A rear diff lock is definitely an advantage, I'm referring to an independently locking diff such as a switch in the console or on the dash.
Some vehicles are fitted at the factory with them and then you have after market options. If you can afford a vehicle with a rear diff lock option then that will come in handy one day. A 4wd with open front and rear diffs is really only a 2wd...for the reason being you have 1 wheel spinning at the front and 1 wheel at the rear when 4wd is engaged.

If you have a LSD then that traction will switch from one side to the other depending on traction and/or the terrain.
If in that particular terrain you're struggling then activate the diff lock, that gives you two back wheels locked in and pushing forward thereby creating 3 wheel drive, difference is if you have a front LSD then you have those wheels switching in and out between left & right under LSD.

Front LSD is not a great idea as steering can be a big problem at the wrong time.